The whine noise of a rear wheel driving battery electric vehicle coasting down to about 45 km/h seriously affects the sound quality of the vehicle subjectively.By means of test analysis.it is found that the 8th order electromagnetic noise leads the whine noise.For the vibration noise source of electric drive body,the mechanism analysis of this electromagnetic noise is carried out,and interchange validation of prototype is done,it determined that the whine noise is strongly associated with motor stator.Through dimension measurement test.It is determined that the mechanism is excessive electromagnetic excitation caused by the deviation concentricity of the motor stator,the inner vehicle whine noise is improved by controlling motor stator concentricity.It provides valuable experience for noise and vibration reduction of electric drive.
关键词
电驱总成/电磁噪声/定子同心度
Key words
electric drive/electromagnetic noise/stator concentricity
维普
万方数据